Apparatus for scraping metal hoops.



I. L HUGHES.

APPARATUS FOR SGRAPING METAL HOOPS.

APPLICATION TILED MAR.26,1909

Patented Apr. 4, 1911.

2 BHEETSSHBET 1.

SGNX

WITNESSES 3 aflmu M (Di 1. I. L. HUGHES. APPARATUS FOR SGRAPING METAL HOOPS.

union-1011 rnnn 11.11.25, 1909.

988,712. Patented Apr.4, 1911.

2 SHEETS-SHEET 21 WITNESSES mvznrron A I 8 1 an. 4? 1 @M ISAAC LAMONT HUGHES, OF YOUNGSTOWN, OHIO.

AP]?AI'LA'IPUS FOB SCRAPING METAL HOOPS.

Specification qt Letters Patent.

Patented Apr. 4, 1911.

Application filed March 25, 1909. Serial No. 485,622.

T 0 all whom it may concern:

Be it known that I, ISAAC LAMONT HUGHES, of Youngstown, Mahoning county, Ohio, have invented a new and useful P pparatus for Scrapin Metal Hoops, of which the following is a 1111, clear, and exact de scription, reference being had to the ac companying drawings, forming part of this specification, in which Figure 1 is a longitudinal sectional elevation on the line II of Fig. 2, showing one form of apparatus, constructed and arranged for use in connection with the finishing rolls of a hoop with my invention; Fig. 2 is a sectional end elevation of the same on the line 11-11 of Fig. 1; Fig. 3 is a detail sectional side elevation showing the scraping-bars forming part of the apparatus in relation to the hoop during the hoop scraping operation; Fig. 4 is a wiring diagram showing the electrical connections of the apparatus.

My invention relates to apparatus employed to remove scale from the surface of rolled metal hoops and similar flexible rolled metal shapes and the invention more particularly relates to scraping apparatus used in connection with the rolls of hoop mills for removing scale from the metal being-rolled, while still hot and before the completion of the rolling operation. Heretofore such scraping operations have been carried out with apparatus which was operated manually to move the scraper bars into and out of their operative position.

With some. classes of work it has been proposed to'employ a fluid pressure cylinder to operate the scraper bars, a manually operated valve controlling the operation of. the cylinder in such case. p

The length of the finished materials made in mddern hoop mills is very much greater.

than in the old ,style hand mills and the speed'at which such materials are now finished is very. largely increased in both type of such mills, in some cases reaching a speed ofsover one thousand feet per minute in the finishing rolls of hoop mills. When thescraping apparatus, as constructed heretofore is used with such high speed mills, a large proportion of the length of thematerials has been passed through the scraper and the rolling pass to which it is applied, before the operatorgcan bring the scraper bars into their operative position. This results in a large part of the material being mill, in accordance unscraped and proving defective, greatly increases the amount of scrap made in such mills and adds to the cost of manufacture.

The object of my invention is to provide improved means for scraping hoops and similar materials by the use of which the scraping operation is effected upon substantially the entire length of the material operated upon and while material of any length is being finished at any desired rate of speed.

Another object of my invention is to provide means whereby the hoop or other blank being scraped automatically operates to maintain the scraper bars of the apparatus in their operative position during the time any portion of the hoop is betiween the scraper-bars.

A further object of the invention is to provide means for actuating the scraper bar operating mechanism which is automatically operated and controlled by the hoop-being scraped in moving the scraper bars into and out of their 0 erative position.

A still furtlier object of my invention is to provide an improved scraping apparatus having novel electro magnetic mechanism by which the scraper bars are actuated and in the use of which electrical energy is used only in the interval in which the scraper bars are being moved into their operating position.

In the drawings, in which my improved apparatus is shown for .use with the bull head orfinishi'ng rolls of a hoop mill, 2 designates the top and 3 the bottom roll of afinishing stand of rolls secured in the usual roll bearings 4 which are mounted in the windows of the roll housings 5. The rolls 2 and 3 are provided with the usual guides 6 and 7 which are adjust-ably secured to the rest bars 9' and 8 which extend between'the sides of the roll housings 5; In front of the guide 7, which is located on the delivery side of the rolls, is an apron plate or delivery table 10 over which the metalpasses in being discharged from the rolls, in this case passing to the hot bed or to the reels.

Mounted above the table or plate 10, on the pivot shaft or pin 11, to which it is keyed or otherwise secured, is a lever or finger 12 which extends downwardly in front of and across'the width of the opening in the box guide 7 in the path of the metal as it issues'from the guide. Also secured to raised a distance suflicient tomove the bell a line drawn between the centers 0 a contact 14 on one end and adjacent to and in the line of movement of the contact 14 is a stationary contact 15. The finger 12 contacts with and is moved by the hoop or other material being rolled, as it emerges from the guide 7 and, through the pivot pin 11 and lever 13 brings the contacts 14 and 15 into engagement for a purpose hereinafter described. I

Secured to the housings 5 on the front or receiving side of the rolls and projecting upwardly above the roll is a frame 16 and, mounted between the sides of this frame are the stationary scraper bars 17, two preferably being used with my improved apparatus. The top surfaces of the bars 17 are preferably in line with the top surface of the bottom roll 3. Mounted in guides on the frame 16, so as to be vertically movable, is the adjustable scraper bar 18. The scraper bar 18 is connected by the forked arms 19 to one end of the links 20 the opposite end of these links being connected to the end of one arm on the bell cranks 21 which are'pivotally mounted on the shaft 22 which is carried in dead eyes or hearings on the frame 16.

Mounted between the upper ends of the frame 16. are the solenoids 23 each of which-'- is provided with acore The'cores 24 are connected by the armature 25- which is providedwith downwardly projecting lugs 26 by which the cores 24 are connected to the end of one arm 21 on each of the bell cranks 21.

Secured on the rearwardly projecting post or arm 27 on the armature 25 is an electrical contact 28 .the upper end of which is providedwith a bridge piece 29 which spans the stationary contacts 30 and 30 on the frame 16 carryingthe solenoids. I

The electrical connections are best illustrated-in Fig. 4, in which 31 designates the source of electric current, one wire of which leads to the movable contact 14. From the stationary contact 15 a wire leads to the stationary contact 30 the other stationary contact 30 being in 'electri,cal connection with one ofthe solenoid coils 23. The solenoids are coupled in series and one solenoid 29 has one pole in electrical connection with the source of current .31. v

,In Fi 1 the scraper bar 18 is shown in its elevate position full lines, .and in its lowered or operative positibn in dotted lines. When the solenoids 23' are energized, the cores 24 are raised thereby rocking'the bell cranks .21 and depressing the movable scraper bai- 18. The solenoid cores will be crank arms 21 and links 20 slightly be end the pivotal connection of the forkedlink 19 and the shaft 22, after which the bridge piice. 29 will pass beyond the stationary conta ts 4 3030 in this way shutting off .current to the solenoid coils so as to prevent overheating or burning of these coils.

In the operation of my improved apparatus the material to be scraped is first passed between the stationary scrapers 17 and the movable scraper 18 and is then passed through the guide 6, then between the rolls 23 and emerges from the guide 7. As soon as the material passes the lever 12, the same will be swung, tilted or moved by contact therewith so as to close 'the' electric circuit through the contacts 14 and 15, the contacts 3030 and solenoids 23 to the source of supply. By completin the circuit, the solenoid coils are energize ,thereby, raising their cores and depressing the scraper 18 so as to bring the scraper bars into contact with the material passing between them. As before stated the cores 24 will be raised to a height suflicient to pass the connecting end of the arm of the bell-cranks 21, with the links 20 beyond, a line passing through the pivoted centers of the bell-crank and opposite end of the link 20, after which the cir cuit will be broken by means of the bridge piece 29 and the stationary contacts 30-30. When the links 20 and the bell-crank arms 21 are moved beyond a line extending through the pivotal centers of the bellcrank and the opposite end of the link 20, as is shown dotted in Fi 1,' the scraper bars will be locked in this position until such time as the hoop being scraped has been passed from between the scraper bars. By reference to Fig. 1 it will be seen that when the arms 21, 21 and the links 20 are in the position shown dotted, so long as a hoopis held between the scraper bars 17 and 18, downward movement of the solenoid core will be prevented, owing to the'pivotal center of the links 20 and the arms 21 being beyond a line extending through the shaft 22 and the end of the links20 pivoted to the forked arms 19. While the hoop is between the scraper'bars, the pull of the rolls on the hoop being scraped causes the hoop to push upwardly on the vertically movable scraper bar 18 and so holds the links and levers in the dotted position shown. When the rear end of the material being operated upon has passed through the scraper, the solenoid core will be lowered 1) reason of their weight and will ra'iset e parts into the position shown'by full lines in Fig. 1.

The foregoing description describes the scraping operation of thin material of very light weight such as hoops in which the material would be slightly'bent, as shown in Fig. 3 while passin between-the scrapers. Should the materia passing between the scra er here not be of a flexible character, so t at the bell-cranks and thin links pass the center, the solenoid will remain energized during the entire scraping operation and will hold the bar 18 in contact with the.

, grooves of various contours in order to and like materials comprising scraper bars,-

scrape rounds, hexagonal, or any other shape being rolled.

The advantages of my invention result from the provision of a scraper which is automatically closed upon the material to be scaled as soon as the material has entered the finishing rolls, and the provision of means by which the scraper will be automatically opened as soon as the rear end of the mate rial being scraped' has left the finishing rolls.

1. Apparatus for scraping metal hoops and like materials comprising a movable scraper bar arranged to contact with and scrape the hoop, means for drawing the hoop through the scraper, and electromag netic means arranged to move the scraper bar into engagement with the hoop being scraped; substantially as described.

2. Apparatus for scraping metal hoops and like materials comprising a movable scraper bar arranged to contact with and scrape the hoop, means for drawing the hoop through the scraper, electromagnetic means arranged to move the scraper bar into engagement with the hoop being scraped, and-means for locking the scraper bar in its operative position while the hoop is being scraped; substantially as described. 3. Apparatus for scraping metal hoops and like materials comprising opposing scraper bars arranged to cont-act with and scrape opposite sides of a metal hoop, means for drawing the hoop through the scraper bars and means for causing a relative move- ,ment of the scraper bars toward each other,

said bar moving means being locked to hold the scraper bars in scraping position while the hoo 'is passing between the scraper bars; su stantially as described.

. 4. Apparatus for scraping metal hoops at least one of said bars being adjustable to- Ward and away from the other and arranged to contact with and scrape opposite sides of a metal hoop, means for drawing the hoop through the scraper, mechanism for bringing the scraper bars into engagement with the hoop and means operated by the hoop being scraped -for causing the actuation of the bar moving mechanism, said moving mechanism being held in operative position by the hoop between said scrapers; substan- 4 tially as described.

5. Apparatus for scraping metal hoops and like materials comprising a movable scraper bar arranged to contact with and scrape the hoop, means for drawing the hoop through the scraper, and electromagnetic means arranged to move the scraper bar into engagement with the hoop being scraped; substantially as described.

6. Apparatus for scraping metal hoops and similar materials comprising a movable scraper bar adapted to contact with and scrape said hoops, means for drawing hoops through the scraper, a toggle arranged to move and hold the bar in its operative position and a solenoid arranged to actuate said toggle in moving said bar into its operative position; substantially as described.

7. Apparatus for scraping metal hoo s and similar materials comprising a movab e scraper bar adapted to contact with and scrape said hoops, means for drawing hoops through the scraper, a toggle arranged to move the bar into its operative position and a solenoid arranged to actuate said toggle in moving said bar into its operative position; substantially as described.

8. Apparatus for scraping metal bars and similar materials comprising a movable scraper bar arranged to contact-with and scrape the hoops, means for drawing the hoops through the scraper, electromagnetic means arranged to move the scraper bar, means controlled by the hoop being scraped arranged to complete the circuit through the electromagnetic meansand means arranged to break the circuit after the scraper bar has moved a redetermined distance; substantially as d escribed.

In testimony whereof, I have hereunto setmy hand.

ISAAC LAMONT HUGHES.

Witnesses: RAY MCLAUGHLIN, J. S. SOHROOK. 

